units to mL calculator
10 mg in 2 mL = 5 mg/mL, so 500 mcg is 0.1 mL = 10 units on a U-100 syringe.
A syringe unit is a volume, not an amount of compound. The table converts readings to mL on U-100 and U-40 scales; the calculator adds the amount each reading holds.
price, vial size and certificate correction
Most 2–15 mg vials hold 3 mL.
From the lot certificate; it replaces the label amount.
draw 10 units
0.1 mL on a 0.3 mL U-100 syringe
- concentration
- 5 mg/mL
- per unit
- 50 mcg per unit
- full draws per vial
- 20
- cost per draw
- —
the working
- 10 mg ÷ 2 mL = 5 mg/mL
- 500 mcg ÷ 5 mg/mL = 0.1 mL
- 0.1 mL × 100 = 10 units on a 0.3 mL U-100 syringe
- 10 mg ÷ 500 mcg = 20 → 20 full draws
If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.
units to mL
syringe reading to volume
| units | U-100 (mL) | U-40 (mL) |
|---|---|---|
| 1 | 0.01 | 0.025 |
| 2 | 0.02 | 0.05 |
| 5 | 0.05 | 0.125 |
| 10 | 0.1 | 0.25 |
| 15 | 0.15 | 0.375 |
| 20 | 0.2 | 0.5 |
| 25 | 0.25 | 0.625 |
| 30 | 0.3 | 0.75 |
| 40 | 0.4 | 1 |
| 50 | 0.5 | 1.25 |
| 75 | 0.75 | 1.875 |
| 100 | 1 | 2.5 |
the arithmetic
formulas
- concentration = amount in the vial ÷ water added (mg/mL)
- mL per draw = amount per draw ÷ concentration
- syringe units = mL × 100 (U-100) or × 40 (U-40)
- water to add = vial amount × units ÷ (amount per draw × 100)
- cost per draw = vial price × amount per draw ÷ vial amount
Worked: 10 mg ÷ 2 mL = 5 mg/mL; 0.25 mg ÷ 5 = 0.05 mL; × 100 = 5 units.
what the numbers mean · where they come from
terms and sources
- Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
- Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
- Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
- Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Price history: peptide price tracker.
Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.
short answers
calculator questions
How many mL is 10 units?
How many units are in 1 mL?
How do I convert units to mg?
more calculators